IBM Types 8122 Parts list manual

ThinkCentre
™
Hardware Replacement Guide
Ty pe s 8122, 8123, 8124
Ty pe s 8131, 8137, 8138


ThinkCentre
™
Hardware Replacement Guide
Ty pe s 8122, 8123, 8124
Ty pe s 8131, 8137, 8138


First Edition (April 2005)
©Copyright International Business Machines Corporation 2005. All rights reserved.
US Government Users Restricted Rights –Use, duplication or disclosure restricted by GSA ADP Schedule Contract
with IBM Corp.

Contents
Overview ..............v
Safety information for replacing CRUs......v
Safety information for replacing FRUs ......v
Additional information resources .......v
Tools required .............vi
Handling static-sensitive devices .......vi
Chapter 1. Locations .........1
Locating components ...........1
Locating controls and connectors on the front of the
computer ...............2
Locating connectors on the rear of the computer ..3
Identifying parts on the system board ......4
Chapter 2. Replacing hardware .....5
Removing the computer cover ........5
Pivoting or removing the optional hard disk drive
mounting bracket .............7
Removing and replacing the front bezel .....8
Replacing the power supply .........8
Replacing the system board assembly......12
Replacing the microprocessor ........19
Replacing amemory module ........25
Replacing an adapter ...........26
Replacing the hard disk drive ........27
Replacing an optical drive .........28
Replacing the diskette drive .........30
Replacing the keyboard ..........30
Replacing the mouse ...........31
Replacing the internal speaker ........31
Completing the installation .........33
Updating (flashing) BIOS from adiskette or
CD-ROM ...............34
©Copyright IBM Corp. 2005 iii

iv Hardware Replacement Guide

Overview
This guide is intended to be used by customers who are replacing Customer
Replaceable Units (CRUs) as well as trained service personnel who are replacing
Field Replaceable Units (FRUs). In this guide CRUs and FRUs will often be
referred to as parts.
This guide does not include procedures for all parts. It is expected that cables,
switches, and certain mechanical parts can be replaced by trained service personnel
without the need for step-by-step procedures.
Note: Use only the parts provided by IBM.
This guide contains procedures for replacing the following parts:
vPower supply
vSystem board
vMicroprocessor
vMemory modules
vOptional PCI adapter
vHard disk drive
vOptical drive
vDiskette drive
vKeyboard
vMouse
vInternal speaker
Safety information for replacing CRUs
Do not open your computer or attempt any repair before reading the “Important
safety information” in the Quick Reference that was included with your computer. If
you no longer have this copy of the Quick Reference, you can obtain one online
from the World Wide Web at http://www.ibm.com/pc/support.
Safety information for replacing FRUs
Do not attempt any repair before reading the “Important safety information” in the
Hardware Maintenance Manual (HMM) for the computer. You can find the HMM on
the World Wide Web at http://www.ibm.com/pc/support.
Additional information resources
If you have Internet access, the most up-to-date information for your computer is
available from the World Wide Web.
You can find the following information:
vCRU removal and installation instructions
vPublications
vTroubleshooting information
vParts information
vDownloads and drivers
vLinks to other useful sources of information
To access this information, go to http://www.ibm.com/pc/support.
©Copyright IBM Corp. 2005 v

Tools required
To replace some parts in your computer, you will need aflat-blade or Phillips
screwdriver. Additional tools might be needed for certain parts.
Handling static-sensitive devices
Static electricity, although harmless to you, can seriously damage computer
components.
When you are replacing apart, do not open the static-protective package
containing the new part until the defective part has been removed from the
computer and you are ready to install the new part.
When you handle parts and other computer components, take these precautions to
avoid static-electricity damage:
vLimit your movement. Movement can cause static-electricity to build up around
you.
vAlways handle parts and other computer components carefully. Handle
adapters, memory modules, system boards, and microprocessors by the edges.
Never touch any exposed circuitry.
vPrevent others from touching the parts and other computer components.
vBefore you replace anew part, touch the static-protective package containing the
part to ametal expansion-slot cover or other unpainted metal surface on the
computer for at least two seconds. This reduces static electricity in the package
and your body.
vWhen possible, remove the new part from the static-protective packaging, and
install it directly in the computer without setting the part down. When this is
not possible, place the static-protective package that the part came in on a
smooth, level surface and place the part on it.
vDo not place the part on the computer cover or other metal surface.
vi Hardware Replacement Guide

Chapter 1. Locations
This chapter provides illustrations to help locate the various connectors, controls
and components of the computer. To remove the computer cover, see “Removing
the computer cover” on page 5.
Locating components
The following illustration will help you locate the various components in your
computer.
1 Optical drive 6 System board
2 Memory modules 7 Lower drive cage (diskette drive and
hard disk drive)
3 Power supply 8 Internal speaker
4 PCI adapter connector 9 Diskette drive
5 Optional PCI adapter
©Copyright IBM Corp. 2005 1

Locating controls and connectors on the front of the computer
This section shows the various external connectors on the computer to which you
can attach external devices.
1
3
9
4
1 IEEE 1394 connector (some
models)
4 Microphone connector
2 USB connector 5 Headphone connector
3 USB connector
2Hardware Replacement Guide

Locating connectors on the rear of the computer
The following illustration shows the location of connectors on the rear of the
computer.
1 Power supply diagnostic
LEDs
11 Ethernet connector
2 Voltage selection switch 12 USB connectors (2)
3 Power connector 13 Standard keyboard connector
4 Audio line in connector 14 Standard mouse connector
5 Audio line out connector 15 PCI Express x16 adapter connector (some
models)
6 Microphone connector 16 PCI adapter connector
7 Serial connector (COM 1) 17 PCI adapter connector
8 Parallel connector 18 PCI Express x1 adapter connector
9 VGA monitor connector 19 Serial connector (COM 2) (some models)
10 USB connectors (2)
Chapter 1. Locations 3

Identifying parts on the system board
The system board (sometimes called the planar or motherboard)is the main circuit
board in your computer. It provides basic computer functions and supports a
variety of devices.
The following illustration shows the locations of parts on the system board.
1 Internal speaker connector 12 PCI adapter connector
2 Memory connector 413 PCI adapter connector
3 Memory connector 314 Serial connector (COM 2)
4 Memory connector 215 PCI Express x1 adapter connector
5 Memory connector 116 Clear CMOS/Recovery jumper
6 Front panel connector 17 Battery
7 Power supply connector 18 Microprocessor fan connector
8 PATA IDE connector 19 Microprocessor
9 System fan connector 20 Microprocessor heat sink
10 SATA IDE connectors (4) 21 12V power connector
11 PCI Express x16 graphics connector 22 Diskette drive connector
4Hardware Replacement Guide

Chapter 2. Replacing hardware
Attention:
Do not remove the computer cover or attempt any repair before reading the “Important
safety information” in the Quick Reference that was included with your computer or in the
Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick
Reference or HMM,go to http://www.ibm.com/pc/support.
Note: Use only the parts provided by IBM.
Removing the computer cover
Important
Turn off the computer and wait 3to 5minutes to let the computer cool
before removing the computer cover.
1. Remove any media (diskettes, CDs, or tapes) from the drives, shut down your
operating system, and turn off all attached devices.
2. Unplug all power cords from electrical outlets.
3. Disconnect all cables attached to the computer. This includes power cords,
input/output (I/O) cables, and any other cables that are connected to the
computer. See “Locating controls and connectors on the front of the computer”
on page 2and “Locating connectors on the rear of the computer” on page 3.
4. Remove any locking devices such as apadlock or Kensington lock that secure
the computer cover.
5. Press the cover-release button on the right side cover, slide the cover to the
rear, and remove.
©Copyright IBM Corp. 2005 5

6. Some models have an optional hard disk drive mounting bracket 1 installed.
When this bracket is installed, access to some of the CRUs or FRUs inside the
chassis is restricted.
Note: There appears to be two drive bays in the bracket. However, due to
thermal restrictions, only the bay 2 at the rear of the chassis can be used to
install ahard disk drive.
See “Pivoting or removing the optional hard disk drive mounting bracket” on
page 7.
To replace the computer cover, see “Completing the installation” on page 33.
6Hardware Replacement Guide

Pivoting or removing the optional hard disk drive mounting bracket
The optional hard disk drive mounting bracket can easily be pivoted upward or
removed if necessary to enable replacement of some CRUs and FRUs.
To pivot the optional hard disk drive bracket upward, pull outward at the bottom
of the bracket.
Note: You might have to disconnect the cables attached to the optional hard disk
drive.
If it is necessary to remove the optional hard disk drive mounting bracket,
disconnect the cables attached to the optional hard disk drive, remove the two
screws, and lift the bracket out of the chassis.
Chapter 2. Replacing hardware 7

Removing and replacing the front bezel
1. Remove the computer cover. See “Removing the computer cover” on page 5.
2. To release the front bezel from the chassis, press downward on the two plastic
tabs 1 and push the bezel outward as shown.
3. To reinstall the bezel, align the plastic tabs 1 on the bottom of the bezel with
the corresponding holes in the chassis, then snap it into position at the bottom
and top of the chassis.
4. Go to “Completing the installation” on page 33.
Replacing the power supply
Attention:
Do not remove the computer cover or attempt any repair before reading the “Important
safety information” in the Quick Reference that was included with your computer or in the
Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick
Reference or HMM,go to http://www.ibm.com/pc/support.
Note: You will need aphillips screwdriver.
1. Remove the computer cover. See “Removing the computer cover” on page 5.
Note: For this procedure, it helps to lay the computer on its side.
8Hardware Replacement Guide

2. To access the 12 Vpower connector, remove the lower drive cage
thumb-screw and slide the lower drive cage toward the rear and out of the
bay. Place the drive cage out of your way without disconnecting the drive
signal cables.
3. Disconnect the power supply cables 1 and 2 from the system board.
4. Disconnect the power cable from each of the drives. Note the location of each
cable that is disconnected.
Chapter 2. Replacing hardware 9

5. Remove the four screws that secure the power supply at the rear of the
chassis.
6. Press inward on the metal retainer inside the chassis and slide the power
supply toward the front of the chassis and lift it out of the chassis as shown.
7. Install the new power supply into the chassis so that the screw holes in the
power supply align with those in the chassis.
Note: Use only the screws provided with the new power supply.
8. Install and tighten the four screws that secure the power supply.
10 Hardware Replacement Guide

9. Reconnect power supply connectors 1 and 2 to the system board.
10. Reinstall the lower drive cage and secure it with the thumb-screw.
11. Reconnect apower supply connector to each of the drives.
12. Go to “Completing the installation” on page 33.
Chapter 2. Replacing hardware 11

Replacing the system board assembly
Attention:
Do not remove the computer cover or attempt any repair before reading the “Important
safety information” in the Quick Reference that was included with your computer or in the
Hardware Maintenance Manual (HMM) for the computer. To obtain copies of the Quick
Reference or HMM,go to http://www.ibm.com/pc/support.
1. Turn off the computer and allow it to cool for one hour.
2. Remove the computer cover. See “Removing the computer cover” on page 5.
Note: For this procedure, it helps to lay the computer on its side.
3. Carefully note the location of all cable connections on the system board. It will
be necessary to reconnect them correctly after you install the new system
board assembly. See “Identifying parts on the system board” on page 4to
locate the cables.
Important
Note the cable routing. It is important to route the cables the same way
after you install the new system board.
4. Remove the air baffle by squeezing the two tabs 1 together and pulling it
out of the chassis.
5. Remove any PCI adapter cards. See “Replacing an adapter” on page 26.
12 Hardware Replacement Guide